Yoko Ono offered a heartfelt appeal for peace in a Facebook post on the 36th anniversary of the murder of her former husband, John Lennon.

"Dear Friends,Every day, 91 Americans are killed with guns.We are turning this beautiful country into a War Zone.Together, let's bring back America, the green land of Peace.The death of a loved one is a hollowing experience.After 36 years, our son Sean and I still miss him," Ono wrote.

Lennon, a founding member of the Beatles, was shot to death by Mark David Chapman on Dec. 8, 1980, as he and Ono were entering their apartment building on Manhattan's Upper West Side.

Ono's Facebook page is filled with other homages to her late husband and his anti-war convictions.

Her profile picture shows Lennon and her huddled behind a poster emblazoned with the words "War is Over!" Her cover photo is also a picture of the phrase, which Lennon put on billboards in cities around the world to protest the Vietnam war in the 1970s.